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Weston current transformer
Weston current transformer

Weston current transformer

Date1920-1940
Inventory Number1997-1-1109
ClassificationTransformer
Subject
    Maker Weston Electrical Instrument Corporation founded 1888
    Cultural Region
      Place of Origin
        Dimensions14 × 4.7 × 10.3 cm (5 1/2 × 1 7/8 × 4 1/16 in.)
        Material
          DescriptionA rectangular bakelite box with a large circular hole crossing through its center. On its top side it has two pairs of electrical connectors, one labeled "PRIMARY" and the other "SECONDARY" with a large bakelite switch in the space between them from which one can select the settings 2, 5, 10 and 20.
          Signedon plaque: WESTON CURRENT TRANSFORMER / MODEL 539 No. 484 CAP. 2 VOLT-AMPS. / FREQ. 25 150 LINE-VOLTS 750 / [instructions for use] / WESTON ELEC. INST. CORP. NEWARK, N.J., U.S.A
          FunctionA current transformer produces a current on its secondary circuit that is proportional to the one on its primary circuit, usually smaller. One can choose the reduction factor with the bakelite switch and if further reduction is needed, one would follow the instructions on the plaque.
          Weston D.C. millivoltmeter
          Weston D.C. millivoltmeter
          Weston Electrical Instrument Corporation
          Date: circa 1923
          Accessories: standardization certificiate (1923) inside lid
          Object number: 1997-1-0335
          direct current milli-voltmeter
          direct current milli-voltmeter
          Weston Electrical Instrument Corporation
          Date: circa 1914
          Accessories: multiplier in case of instrument; standardization certificate from the Weston Laboratory, Newark, N.J. Feb.1914 on lid of wooden case
          Object number: 0278
          wattmeter
          wattmeter
          Weston Electrical Instrument Corporation
          Date: circa 1925
          Object number: 1997-1-1053
          wattmeter
          wattmeter
          Weston Electrical Instrument Corporation
          Date: circa 1925
          Object number: 1997-1-0342
          Weston A.C. voltmeter
          Weston A.C. voltmeter
          Weston Electrical Instrument Corporation
          Date: circa 1910
          Object number: 1997-1-0333
          D.C. voltmeter (and ammeter?)
          D.C. voltmeter (and ammeter?)
          Weston Electrical Instrument Corporation
          Date: circa 1913
          Object number: 1997-1-0328
          AC ammeter
          AC ammeter
          Weston Electrical Instrument Corporation
          Date: circa 1930
          Object number: 1997-1-0704
          A.C. voltmeter, 0-125
          A.C. voltmeter, 0-125
          Weston Electrical Instrument Corporation
          Date: circa 1925
          Object number: 1997-1-1049
          Weston D.C. voltmeter
          Weston D.C. voltmeter
          Weston Electrical Instrument Corporation
          Date: circa 1890
          Object number: 1997-1-1061
          gaussmeter or magnetometer
          gaussmeter or magnetometer
          Rawson Electrical Instrument Company
          Date: 1960s
          Accessories: the probe 2012-1-0036 plugs to this instrument
          Object number: 2012-1-0035
          Weston D.C. ammeter
          Weston D.C. ammeter
          Weston Electrical Instrument Corporation
          Date: 1901-1920
          Accessories: undated standardization certificate on inside of lid
          Object number: 1997-1-0325
          control console from Harvard Cyclotron Laboratory
          control console from Harvard Cyclotron Laboratory
          Harvard Cyclotron Laboratory
          Date: 1947-2002
          Object number: 2003-1-0291